SECR Q1 class

SECR Q1 class
Type and origin Power type Steam Designer Harry Wainwright Rebuild date 1903–1919 Number rebuilt 55
Specifications Configuration: ​  • Whyte 0-4-4T  • UIC B2′ n2t Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver dia. 5 ft 6 in (1.676 m) Loco weight 49.6 long tons (50.4 t) Fuel type Coal Boiler pressure 150 lbf/in2 (1.03 MPa) Cylinders Two, Cylinder size 18 in × 26 in (457 mm × 660 mm) Valve gear Stephenson valve gear
Performance figures Tractive effort 16,274 lbf (72.39 kN)
Career Operators South Eastern and Chatham Railway → Southern Railway Class Q1 Number in class 1 January 1923: 46 Withdrawn 1909–1930 Disposition All scrapped

Type and origin
Power type	Steam
Designer	Harry Wainwright
Rebuild date	1903–1919
Number rebuilt	55

Specifications
Configuration:	​
• Whyte	0-4-4T
• UIC	B2′ n2t
Gauge	4 ft 8 1⁄2 in (1,435 mm)
Driver dia.	5 ft 6 in (1.676 m)
Loco weight	49.6 long tons (50.4 t)
Fuel type	Coal
Boiler pressure	150 lbf/in2 (1.03 MPa)
Cylinders	Two,
Cylinder size	18 in × 26 in (457 mm × 660 mm)
Valve gear	Stephenson valve gear

Performance figures
Tractive effort	16,274 lbf (72.39 kN)

Career
Operators	South Eastern and Chatham Railway → Southern Railway
Class	Q1
Number in class	1 January 1923: 46
Withdrawn	1909–1930
Disposition	All scrapped

The SECR Q1 class was a class of 0-4-4T steam locomotives of the South Eastern and Chatham Railway. The class was rebuilt from older Stirling Q class locomotives by Harry Wainwright between 1903 and 1919. These locomotives should not be confused with the later SR Q1 class 0-6-0.

Fifty-five locomotives were rebuilt and 46 survived into Southern Railway ownership on 1 January 1923 with random numbers between 12 and 423. All had been withdrawn by 1930.

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